Job Interview for Python Programming

Top 25 Interview Questions For Python To Get A Good Job in 2020

July 30, 2020

Python is one of the most important programming language that is used almost in every area. The reason behind python being the most preferred language is its features, versatility, and flexibility. Python is object oriented and is easy to learn so anyone can learn it without any difficulty.

Job Interview for Python Programming

Python is used in various areas like Web testing, Data extraction, Artificial intelligence and Machine learning, Web development, Cyber security, etc. The average salary of a python developer is also very high that is why a lot of people prefer learning this programming language. Python has vast libraries and excellent user support that is considered as its biggest advantage and benefit.

Python has extensible and portable properties and it is also supported by almost all operating system. Python is an important language that a user must learn if they want to enter in the field of artificial intelligence. Python is very important language for every programmer because of its features and functionality.

Top Interview Questions for Python

Here we have mentioned the Python basic interview questions that are frequently asked in the python interview:

1) What is python programming?

Python is open source and object oriented programming language that is used for different types of applications. It can run on various platforms like Windows, Linux, UNIX, etc. It offers excellent community support and also has extensive library.

2) What is python programming used for?

Python programming is used for web development, Scientific and computational applications, Artificial intelligence and machine learning, GUI applications, etc.

3) What is python interpreter?

An interpreter reads and executes the code. Python interpreter is a stack machine that manipulates different stacks to perform various operations. It is a bytecode interpreter and the input is the instruction sets known as bytecode.

4) What is list in python?

List is a data structure in python that allows you to store different types of data in it. Every value inside the list is called an item. Lists are represented as the values in between the square bracket.

5) What are strings in python?

In python strings are arrays that represents the sequence of characters. You can use square brackets to access the elements of string. Once a string is defined then you cannot change them.

6) What is dict in python?

It is a collection of data that is used to store data values. It is a built in function and is also known as associative arrays in other programming languages.

7) What is PEP 8?

It is python enhancement proposal that provides the guideline on how to write the python code. It improves the readability and consistency of python code.

8) What is PYTHONPATH?

It is an environment variable that can be set to add additional directories. Python will look for modules and packages in these directories. In short, it tells python where to look for modules.

9) What is the difference between list and the tuple and why they are used?

Lists and tuples are used to store a collection of objects. Some basic difference between list and tuple are as follows,
• List is mutable which tuple is not.
• Tuple cannot be updated whereas lists can be updated.
• Tuples are surrounded by ( ) and lists are surrounded by [ ].

10) What is pass in python?

Pass statement is a null operation and nothing happens when it is executed. I is used for making the code syntactically correct.

11) What are the limitations of python?

• It is slow compared to other programming languages like C/C++ or Java.
• Python is weak for mobile development and hence it is not preferred.
• Memory consumption is also high in python.
• Python also has design restrictions.

12) How does python handle memory management?

Memory is maintained and managed with the help of private heap. This heap contains all the objects and data structures. Pythons has an in-built garbage collection that recycles the unused memory.

13) What are positive and negative indices?

When positive indices are applied then search begins from left to right whereas, when negative indices are applied then search begins from right to left.

14) What is the use of relational, assignment, and membership operators in python?

• Relational operators – They are used to compare values
• Assignment operators – They are used to assign value to the variables
• Membership operators – It validates the membership of a value.

15) What is the index in python?

Index refers to a position in a list or string. String is a list of characters and you access them with the help of index.

16) What is lambda function in python?

You can create anonymous function with the help of lambda function. It can accept any number of arguments but it can only have one statement.

17) What are the libraries of python that are used for Artificial intelligence and Machine learning?

Various libraries used for development of AI and ML are,

• SciPy
• NumPy
• PyBrain
• Sickit-learn, etc.

18) What is pickling and unpickling in python?

Pickling converts any python object into byte stream and dumps it into a file with the help of dump function.
Converting the byte stream back into the python object is known as unpickling.

19) What is self in python?

Self represents the object of a class. You can differentiate between attributes and methods of the class with the help of self.

20) What is namespace in python?

Namespace is just a naming system. It makes sure that all the names are unique and also prevents the naming conflicts.

21) What is python module?

Modules in python are the files that have .py extension. It has a set of functions, classes, or variables that are defined and implemented. Modules make the code simple and efficient.

22) What is the difference between .py and .pyc files?

.py contains the source code of a program and .pyc has the bytecode of a program. Bytecode is obtained after the compilation of .pyfiiles.

23) What are the different types of operators in python?

Every operator is used for performing different set of operations. List of various operators are as follows:

• Assignment operators
• Identity operators
• Bitwise operators
• Logical operators
• Membership operators
• Comparison operators, etc.

24) What is scope in python?

Every object in python remains relevant in a specific area that is defined to it, which is called scope. There are different type of scope that are created during code execution in python and that are,

• Local scope
• Global scope
• Module-level scope
• Outermost scope

25) What are the key features of python programming language?

The important features of python are,

• Open source and object oriented programming language.
• Easy to learn.
• Vast range of libraries.
• High-level language.
• Excellent community support
• Dynamically typed language, etc.

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